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(2,4,5-TRICHLOROPHENOXY) ACETIC ACID
ICSC: 0075
Peer-Review Status: 21.04.2005 Validated
2,4,5-T 
CAS #: 93-76-5 RTECS #: AJ8400000
UN #: 3345
EC #: 607-041-00-9
EINECS #: 202-273-3
    Formula: C8H5Cl3O3 / C6H2Cl3OCH2COOH
Molecular mass: 255.5

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible under specific conditions. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use water spray, powder. 
EXPLOSION      
 
EXPOSURE See Notes.  PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN!   
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin   Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Diarrhoea. Drowsiness. Headache. Nausea. Vomiting.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: Xn, N; R: 22-36/37/38-50/53; S: (2)-24-60-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT7-III.  Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
WHITE CRYSTALLINE POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on heating and on burning. This produces toxic and corrosive gases including phosgene (see ICSC 0007) and hydrogen chloride (see ICSC 0163). The solution in water is a weak acid. 

Occupational exposure limits
TLV: 10mg/m³ as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK (inhalable fraction): 10 mg/m³; Peak limitation category: II(2); Pregnancy risk group: C; Skin absorption (H); (DFG 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered. 

Effects of short-term exposure
The substance is irritating to the eyes and respiratory tract. 

Effects of long-term or repeated exposure
Animal tests show that this substance possibly causes toxicity to human reproduction or development. See Notes. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes
Melting point: 153-158°C
Density: 1.80 g/cm³
Solubility in water, g/100ml at 25°C: 0.03
Vapour pressure at at 25°C°C: negligible
Octanol/water partition coefficient as log Pow: 4  
The substance is very toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
Temperature of decomposition unknown in literature.
Commercial products may contain toxic dioxin (see ICSC 1467 2,3,7,8-TCDD).
If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s).
Carrier solvents used in commercial formulations may change physical and toxicological properties.
The recommendations on this card also apply to salts of 2,4,5-Trichlorophenoxyacetic acid.
Esterone 245, Trioxone and Weedone are trade names. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations